Tyranitar @ Assault Vest
Ability: Sand Stream
EVs: 252 HP / 4 Atk / 252 SpD
- Rock Tomb
- Ice Beam / Pursuit / Fire Blast
Ok pretty unespected set.
But it's really cool for every special Pokémon that doe not run a fighting move. It takes well Tapu Koko, Tapu Lele locked in every moves that is not Focus Blast. Charizard Y can be a victim of this thing if you played right. Also it has a pretty support with Rock Tomb or Ice Beam. Well, the moves is on you, the important thing is that Tar is running a rock-type move.
This Tyranitar can switch in on every Volcarona's moves without troubles.
+1 252+ SpA Volcarona Bug Buzz vs. 252 HP / 252+ SpD Assault Vest Tyranitar in Sand: 84-102 (40.5 - 49.2%) -- guaranteed 3HKO
+1 252+ SpA Volcarona Giga Drain vs. 252 HP / 252+ SpD Assault Vest Tyranitar in Sand: 48-58 (23.1 - 28%) -- 72.2% chance to 4HKO
While Tyranitar needs just to use a Rock Tomb:
0 Atk Tyranitar Rock Tomb vs. 4 HP / 0 Def Volcarona: 244-292 (151.5 - 181.3%) -- guaranteed OHKO
If Volcarona is sashed, the sand will break it and Volcarona is doomed.